[ProfileAPI] Return "500 Server error occurred" when searching without result by FirstSeen, LastSeen, UpdateTime

Description

1. Search for profile by incorrect LastSeen
https://psinte.azure-api.net/inte-profilesapi/api/v1.0/Profiles/?$filter=LastSeen eq script
https://psinte.azure-api.net/inte-profilesapi/api/v1.0/Profiles/?$filter=LastSeen eq 2017/10/10
https://psinte.azure-api.net/inte-profilesapi/api/v1.0/Profiles/?$filter=LastSeen eq 10/10/2017

• R1: Status code: 500 Server error occurred
  Response body:
  {
  "error": { "code": "500", "message": "Server error occurred.", "target": "", "details": [] }

  }
  The same with FirstSeen and UpdateTime
  => Expected result:
  Status code: 200 OK
  Response body:

  { "items": [], "total": 0, "count": 0 }

NOTE: The same issue in searching track event without result by EventTime
https://psinte.azure-api.net/inte-profilesapi/api/v1.0/Trackevents/?$filter=EventTime eq script